Tunnelling - Section 1 (4)

The following operations are required for tunnelling in rocky terrain :

1. Removing the foul gases
2. Marking the tunnel profile
3. Setting up and drilling
4. Checking misfire
5. Mucking
The correct sequence is :

For highways, tunnelling is preferred to if the open cut exceeds :

Which one of the following methods of tunnelling does not require the use of time bearing :

Pick up the mechanical ventilation method used for tunnels from the following:

The following operations are generally employed for tunnelling in hard rock.

1. Removing ground water,
2. Loading holes and firing the explosive
3. Setting up and drilling
4. Grouting and lining
5. Removing muck
6. Ventilation and removing explosion dust
The correct sequence is :

The following tunnels were constructed in different countries for different purposes :

1. Emperor Claudius built the first Roman tunnel
2. The first highway tunnel was constructed in Hungary
3. The first underground railway tunnel was constructed in Great Britain
4. The first navigational tunnel was constructed in France.
The correct chronological development of these tunnels is:

In case of railways,

Which one of the following linings is suitable for shield driven tunnels particularly in the subaqueous regions :